Last seen in:
- New York Times - Mar 20 2020
- The Chronicle of Higher Education - Mar 6 2015
- The Times - Concise - Sunday Times Concise 1111 - July 5, 2009
- Boston Globe - May 31 2009
- The Times - Concise - Sunday Times Concise 772 - December 29, 2002
- The Times - Concise - Sunday Times Concise 706 - September 23, 2001